I have a 2000 with 82k on it and when I put air in the tires last week I noticed that the vehicle keep leveling itself instead of holding steady. Is this normal?

Also, how in the heck do you turn off the HVAC unit?

 

Can't help you on the leveling aspect. My first guess would be a height sensor that is acting up. The hvac unit basically never turns off. If you are just trying to turn the hvac fan off, you will need to push the "a/c off" button and then turn the fan down until its off.